70 CAMBRIAN BRACHIOPODA. 



Present reference. 



Obolella chromatica Walcott [1885a, pp. 115 and 117] Obolella crassa. 



Walcott [1886b, p. 112] Obolella chromatica. 



Walcott [1891a, p. 611] Do. 



Walcott [1899, p. 446] Do 



Walcott [1905a, p. 313] Do. 



Obolella cingulata Billings [1863, p. 284, figs. 2S7a-b] Kutorgina cingulata. 



Billings [1863, p. 284, fig. 287c] Rustella edsoni. 



Obolella circe Billings [1872a, pp. 219-220] Quebecia circe. 



Billings [1872c, pp. 357-358] Do. 



Walcott [1886b, p. 118, PL X, fig. 3] Obolella chromatica. The text includes 



Quebecia circe. 



Walcott [1886b, p. 118, PI. X, fig. 3a] Quebecia circe. 



Walcott [1891a, p. 611, PL LXXI, fig. 3] Obolella chromatica. The text includes 



Quebecia circe. 



Walcott [1891a, p. 611, PL LXXI, fig. 3a] Quebecia circe. 



Obolella circe? Walcott [1891a, fig, 62, p. 611] Obolella crassa. 



Obolella?? complexus Hall and Clarke [1892c, p. 73] Obolus complexus. 



Obolella crassa Billings [1872a, p. 218] Obolella crassa. 



BilUngs [1872c, p. 356] Do. 



Bornemann [1891, pp. 439-440] Obolus? zoppi. 



Ford [1878, p. 128] Obolella crassa. 



Ford [1881, pp. 131-133] Do. 



Ford [1886a, fig, 2, p. 466] Do. 



Gorham [1905, PL I, figs, la-f] Obolella atlantica. 



Grabau and Shimer [1907a, pp. 188-189] Obolella crassa. 



Hall and Clarke [1892a, PL III, figs. 5-7] Do. 



Hall and Clarke [1892c, p. 70] Do. 



Shaler and Foerste [1888, p. 27] Obolella atlantica. 



Walcott [1885b, p. 21] Obolella crassa. 



Walcott [1886b, p. 114] Do. 



Walcott [1891a, p. 612] Do. 



Walcott [1905a, p. 321] Do. 



Obolella crassa? Grabau [1900, pp. 619-620] Do. 



Obolella crassa elongata Walcott [new] Obolella i 



Obolella desiderata BilKngs [1862d, pp. 69-70] Elkania desiderata. 



Davidson [186S, p. 309] Do. 



Obolella? desiderata Walcott [1886b, p. Ill] Do. 



Obolella desquamata Billings [1872a, p. 218] Obolella crassa. 



Billings [1872c, p. 356] ". Do. 



Obolella discoida Hall and Whitfield [1877 , p . 205] Obolus discoideus . 



Obolella? discoidea Hall and Clarke [1892c, p. 69] Do. 



Obolella discoidea Walcott [1884b, p. 14] Do. 



Obolella? discoidea Walcott [1886b, p. Ill] Do. 



Obolella gamagei Hobbs [1899, pp. 114-115] Acrothele j 



Obolella gemma Billings [1872a, pp. 218-219] Bicia j 



BilUngs [1872c, p. 355] Do. 



Hall and Clarke [1892c, pp. 69 and 71] ' Do. 



Walcott [1886b, pp. 116-117] Do. 



Walcott [1891a, p. 612] Do. 



Obolella? gemmula Matthew [1892, pp. 41-42] Lingulella ferruginea. 



Obolella (?) groomi Matley [1902, pp. 137 and 139] Obolella groomi. 



Obolella ida BilUngs [1862d, p. 71] Elkania ida. 



Obolella ida? Dawson [1888a, p. 55] Acrotreta sagittalis. 



Dawson [1888b, p. 55] Do. 



Obolella? ida Walcott [1886b, p. Ill] Elkania ida. 



Obolella lindstromi Walcott [1901, pp. 674-675] Obolella? lindstromi. 



Obolella maculata Davidson [1868, p. 311] Acrothele maculata. 



Davidson [1871, p. 341] Do. 



Delgado [1904, p. 364] Acrothele villaboimensis. 



Salter [1866a, p. 285] Acrothele maculata. 



Obolella minor Clark and Mathews [1906, p. 252] Obolella minor. 



Obolella minuta Walcott [1899, p. 443] Linnarssonella minuta. 



Obolella? minuta Walcott [1897a, p. 404] Do. 



